TY - JOUR L1 - http://www.journals.pan.pl/Content/93587/PDF/10267-Volume59_Issue3-01_paper.pdf L2 - http://www.journals.pan.pl/Content/93587 PY - 2014 IS - No 3 DO - 10.2478/amsc-2014-0041 A1 - Czaja, Piotr A1 - Tajduś, Antoni A1 - Kamiński, Paweł A1 - Klich, Jerzy PB - Committee of Mining PAS DA - 2014 T1 - Hybrid Technology of Hard Coal Mining from Seams Located at Great Depths UR - http://www.journals.pan.pl/dlibra/publication/edition/93587 T2 - Archives of Mining Sciences ER -